Thomas v



(No Model.)

T. V. ALLIS. Blank for Barbed Metallic Pence Rods.-

No. 234,936. Patented Novf30, 1880.

I THOMAS V. ALLIS, OF NEW YORK, N. Y.

BLANK FOR BARBED METALLIC FENCE RODS.

SPECIFICATION formingpart of Letters Patent No. 234,936, dated November30, 1880.

Application filed June 17, 1880.

T0 all-whom it may concern:

Be it known that I, THOMAS V. ALLIS, of the city, county, and State ofNew York, have invented a new and useful Improvement in Blanks forBarbed Metallic Fence Rods, of which the following is a specification.

My invention consists of a blank rod specially designed for themanufacture of twisted barbed metallic fencing, having one row of barbsmade. out of a tin of said rod, with narrow webs of said fin along therod and connecting the bases of the barbs, said rod, also, havingana-rrow plain fin on the side opposite to said webs, between the barbs,of about the same width, for balancing them when the rod is twistedafter the barbs are formed on it, to make it twist straightly, whichsaid blank is composed of two cores or ribs connected bya thin web toform the barbs and their connecting-webs, and a narrow fin'to each coreor rib opposite the said connecting-web, to make the aforesaid balancingfins for insuring straightncss in the rod when twisted after the barbsare formed.

The advantages of this form of blank are, first, the facility with whichit can be rolled, in consequence of only requiring grooves in the rollsfor the cores or rib portions, while the web and the fins may be madebetween the plain faces of the rolls; and, second, the fins come in theplaces where fins naturally make in rolling metal.

The web furnishes the barbs for both rods by so punching the surplusmetal away that the barbs of one are made in the spaces between thebarbs of the other red.

Figure 1 represents a plan view of my improved blank rod for barbedfencing. Fig. 2 isa transverse section of the blank. Fig. 3 is anelevation of the rolls for making the blank and a section of the latter,and Fig. 4 is a plan of a section of the blank, partly punched, as inthe making the barbs and separating the rods one from the other.

a. represents the said ribs or cores; 1), the

(No model.)

web connecting the same, to make the barbs d and the narrow webs 6,connecting the bases of the barbs, along the core, and 0 represents theoutside narrow fins opposite to the web I) and the barbs d and webs 0,made from said web, for balancing said webs 0 when the barbed rod isfinally twisted. If the web I) could be cut close to the side of theribs a, so as not to leave the narrow webs c, this balancing-fin 0 wouldnot be needed, as the rod would then twist straightly; but it cannotwell be done when the web I) radial to the core, because the die onwhich the core lies to be punched has to be. grooved for the core, whichmakes an acute-angled edge to the die, which Wlll not last under theblows of the punches; consequently it has to be strengthened bywideningthe metal between the groove and the cutting-edge beyond theradius of the core from which the webs eresult, which webs, ifunbalanced, would prevent the rod from twisting straightly, andtherefore require the balancing effect of the fin c.

A represents the rolls for making this blank, which are plain, except agroove, B, for each of the ribs or cores a of the blank.

I am aware that blanks for making nails, combs, rakes, 850., consistingof two parallel ribs connected by a thin web, have been made; butlam notaware that such form of metal with theoutside narrow fins, 0, have everbefore been employed as a blank for the manufacture ofany article.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

The improved blank rod herein described for barbed metallic fencin g,consisting of two ribs-or cores, (0, each having a narrow outside fin,c, and being connected by a thin web, 1), between them, substantially asspecified.

THOMAS V. ALLIS.

Witnesses A. P. THAYER, H. S. BURT.

